KR100241627B1 - A radial tire - Google Patents

A radial tire Download PDF

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Publication number
KR100241627B1
KR100241627B1 KR1019970045909A KR19970045909A KR100241627B1 KR 100241627 B1 KR100241627 B1 KR 100241627B1 KR 1019970045909 A KR1019970045909 A KR 1019970045909A KR 19970045909 A KR19970045909 A KR 19970045909A KR 100241627 B1 KR100241627 B1 KR 100241627B1
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South Korea
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weight
parts
under
carbon black
rubber
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KR1019970045909A
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Korean (ko)
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KR19990024658A (en
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안용진
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홍건희
한국타이어주식회사
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B60C1/0016—Compositions of the tread
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L7/00—Compositions of natural rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
    • B60C2001/0066—Compositions of the belt layers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0843—Cobalt

Abstract

본 발명은 대형 레디알 타이어의 언더트래드(8)와 벨트에지커버(7)의 고무조성방법에 관한 것으로, 벨트층 상부의 언더트래드(8)와 벨트93) 끝단부를 고정시키는 벨트에지커바(7)를 소정의 방법으로 구성하므로써 주행시 타이어의 내발열성이 향상되어지고 변형이 감소되도록 한 것이다.The present invention relates to a rubber forming method of the under-trad (8) and the belt edge cover (7) of a large radial tire, the belt edge cover (7) for fixing the ends of the under-rod (8) and belt 93 of the upper belt layer By configuring the method in a predetermined manner, the heat resistance of the tire during driving is improved and deformation is reduced.

Description

래디알 타이어Radial tires

본 발명은 래디알 타이어에 관한 것으로, 특히 주행시 타이어의 발열과 변형이 억제되어 내구성이 향상되도록 된 래디알 타이어에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radial tire, and more particularly, to a radial tire in which heat generation and deformation of the tire during driving are suppressed to improve durability.

일반적으로 자동차용 타이어는 노면과 접촉하는 트래드부와, 이 트래드부의 양측으로 노면과 차량축으로부터 충격을 흡수하며 카카스(carcass)를 보호하는 측벽부, 카카스를 고정하고 림에 장착되는 비드부 및, 트래드와 카카스 사이의 특수 코드층으로 노면의 충격을 감소시켜주며 타이의 강도를 보강하는 벨트로 구성된다.Generally, tires for automobiles have a tread portion in contact with the road surface, sidewall portions that absorb shock from the road surface and the vehicle axle on both sides of the tread portion, and protect the carcass, and bead portions fixed to the carcass and mounted on the rim. And a belt that reduces the impact of the road with a special cord layer between the tread and the carcass and reinforces the tie strength.

통상 고무와 같은 탄성체는 금속체에 비하여 적은 응력으로도 비교적 크게 변형되고, 변형시 내부 점성으로 인해 히스테리시스 손실에 의한 손실 발열이 크게 발생되므로, 반복적인 변형 응력이 발생되는 주행시에는 래디알 타이어의 온도가 고온으로 상승된다. 또한, 래디알 타이어는 구조상으로 적층된 벨트층의 끝단 부분에 응력이 집중된다.In general, an elastic body such as rubber is relatively largely deformed even with a small stress compared to a metal body, and a large amount of heat generation is generated due to hysteresis loss due to internal viscosity during deformation. Is raised to high temperature. In addition, in the radial tire, the stress is concentrated at the end portions of the belt layers stacked structurally.

따라서, 래디알 타이어의 온도가 고온으로 상승되면 고무의 점성이 증가되므로, 타이어를 구성하는 각 구성요소간의 접합력이 저하되어 내구성이 크게 저하되며, 특히 벨트층의 끝단 부분이 박리되어 타이어가 파괴기도 한다.Therefore, when the temperature of the radial tire rises to a high temperature, the viscosity of the rubber is increased, so that the bonding strength between the components constituting the tire is degraded, and the durability is greatly reduced. do.

따라서, 타이어의 트래드 부위의 발열과 타이어 변형으로 야기괴는 타이어의 파괴 및 분리 현상을 방지하기 위해 발열과 변형을 최소화하는 설계기술이 요구되는바, 종래에는 카본블랙을 사용하여 캡트래드의 발열을 낮추거나, 벨트 끝단에 벨트에지커버를 장착하여 벨트층의 박리를 감소시키고 있다.Therefore, in order to prevent the destruction and separation of tires caused by heat generation and tire deformation of the tread portion of the tire, a design technology for minimizing heat generation and deformation is required. In the related art, carbon black is used to lower the heat generation of the captrad. Alternatively, the belt edge cover is attached to the belt end to reduce peeling of the belt layer.

그러나, 상기 종래 기술에 따르면, 캡트래드의 발열을 낮추기 위하여 비표면 적이 작은 카본블랙을 사용하고 있지만, 이러한 카본이 함유된 고무조성물은 내마모성이 작아서 캡트래드가 쉽게 마모되어 래디알 타이어의 제품수명이 감소되는 문제점이 있었다.However, according to the prior art, although carbon black having a small specific surface area is used to reduce the heat generation of the cap tread, the rubber composition containing such carbon has a low wear resistance, so the cap tread is easily worn and the life of the radial tire is increased. There was a problem that was reduced.

이에 본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로, 타이어의 발열과 변형이 억제되어 내루성이 향상되도록 된 래디알 타이어를 제공함에 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to provide a radial tire that is improved heat resistance and deformation of the tire is suppressed.

제1도는 본 발명에 따른 래디알 타이어의 부분단면도이다.1 is a partial cross-sectional view of a radial tire according to the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 캡트래드 2 : 숄더부1: captrad 2: shoulder portion

3 : 벨트 4 : 측벽3: belt 4: side wall

5 : 카카스 6 : 비드5: carcass 6: bead

7 : 벨트에지커버 8 : 언더트래드7: belt edge cover 8: under tread

상기와 같은 목적을 달성하기 위한 본 발명은, 723 내지 792 kpa의 팽창압력하에서 1220㎏ 이상의 TRA(Tire Rim Association)평가 제한 하중치를 만족하면서 비드직경이 48㎝ 이상이며, 언더트래드 하부의 벨트층 끝단에 벨트에지커버가 부착되어진 래디알 타이어에 있어서, 상기 언더트래드는 고무 100 중량부를 기준으로, 시스 1,4-폴리이소프렌 천연고무 100중량부와, 카본블랙 30 내지 45중량부, 침전된 실리카 5 내지 15중량부, 실리카 표면과 반응성이 실란잔기 및 상기 조성성분들과 상호 작용하는 하나 이상의 실리카 커플링제가 함유된 탄성중합체 조성물이고, 또한 상기 벨트에지커버는 고무 100 중량부를 기준으로, 시스 1,4-폴리이소프렌 천연고무 100중량부와, 카본블랙 55 내지 65중량부 및, 코발트 0005 내지 0.15중량부를 제공하는 유기한 코발트염가 함유된 탄성중합체 조성물인 것을 특징으로 한다.The present invention for achieving the above object, bead diameter of 48 cm or more while satisfying the TRA (Tire Rim Association) evaluation limit load value of 1220kg or more under an expansion pressure of 723 to 792 kpa, the belt layer end of the under-trad In a radial tire having a belt edge cover attached thereto, the undertrade is 100 parts by weight of natural cis 1,4-polyisoprene rubber, 30 to 45 parts by weight carbon black, and silica 5 based on 100 parts by weight of rubber. To 15 parts by weight, an elastomer composition containing a silane residue reactive with silica surface and at least one silica coupling agent that interacts with the components, and the belt edge cover is based on 100 parts by weight of rubber, based on sheath 1, Elasticity containing 100 parts by weight of 4-polyisoprene natural rubber, 55 to 65 parts by weight of carbon black, and organic cobalt salt which provides 0005 to 0.15 parts by weight of cobalt. Characterized in that the polymer composition.

이하 본 발명을 첨부된 예시도면에 의거하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

제1도는 본 발명에 따른 래디알 타이어의 부분단면도인 바, 이에 따르면, 벨트(3)와 캡트래드(1) 사이에 소정의 조성성분으로 구성된 언더트래드(8)가 부착되고, 이 언더트래드(8)과 벨트(3)층의 끝단 사이에는 벨트에지커버(7)가 부착되어 있다.1 is a partial cross-sectional view of a radial tire according to the present invention, whereby an under tread 8 composed of a predetermined composition is attached between the belt 3 and the cap tread 1, and the under tread ( A belt edge cover 7 is attached between 8) and the end of the belt 3 layer.

여기서 상기 언더트래드(8)는 고무 100중량부를 기준으로, 시스 1,4-폴리이소프렌 천연고무 100phr와, 카본블랙 30 내지 45phr, 침전된 실리카 5 내지 15phr, 실리카 표면과 반응성인 실란잔기, 상기 조성성분들과 상호작용하는 하나 이상의 실리카 커플링제 및, 기타배합제로 구성된다. 상기 기타배합제는 촉진제와 가류제 및 노화방지제로 구성되며, 촉진제로는 노말 터트부틸 2 벤조디아질 설펜아마이드 1중량부를 사용하고, 가류제로는 황 2.2중량부와 스테아린산 2중량부 및 산화아연 3중량부를 사용하며, 노화방지제로는 노말 1,3디메티부틸 노말 페닐 파라핀 페닐렌디아민 1.5 중량부와 폴리2,2,4 트리메틸 1,2 디하이드로 퀴놀린 1중량부 및 왁시 하이드로 카본 1중량부를 사용한다.Wherein the under-trad (8) is based on 100 parts by weight of rubber, cis 1,4-polyisoprene natural rubber 100phr, carbon black 30 to 45phr, precipitated silica 5-15phr, silane residue reactive with the silica surface, the composition One or more silica coupling agents that interact with the components, and other blending agents. The other blending agent is composed of an accelerator, a vulcanizing agent and an anti-aging agent, and as a promoter, 1 part by weight of normal tertbutyl 2 benzodiazyl sulfenamide is used, and as a vulcanizing agent, 2.2 parts by weight of sulfur, 2 parts by weight of stearic acid, and zinc oxide 3 By weight, as an anti-aging agent, 1.5 parts by weight of normal 1,3 dimethybutyl normal phenyl paraffin phenylenediamine, 1 part by weight of poly2,2,4 trimethyl 1,2 dihydroquinoline, and 1 part by weight of waxy hydrocarbon are used. do.

또한, 벨트에지커버(7)는 고무 100중량부를 기준으로, 시스 1,4-폴리이소프렌 천연고무 100phr와, 카본블랙 55 내지 65phr, 코발트 0.05 내지 0.15phr을 제공하는 적당량의 유기한 코발트염 및, 기타배합제로 구성된다. 상기 기타 배합제로는, 노말 다이시클로헥실 2 벤조디아질 설펜마이드 1중량부를 이용하는 촉진제와, 황 7중량부 및 산화아연 7중량부를 이용하는 가류제 및, 노말 1,3 디메티부틸 노말 페닐 파라핀 페닐렌디아민 1.5중량부와 폴리2,2,4 트리메틸 1,2 디하이드로 퀴놀린 1중량부 및 왁시 하이드로 카본 1중량부를 이용하는 노화방지제를 사용된다.In addition, the belt edge cover 7 is based on 100 parts by weight of rubber, based on 100 parts of cis 1,4-polyisoprene natural rubber, a suitable amount of organic cobalt salt to provide 55 to 65 phr of carbon black, 0.05 to 0.15 phr of cobalt, and It consists of other compounding agents. Examples of the other compounding agents include accelerators using 1 part by weight of normal dicyclohexyl 2 benzodiazyl sulfenamide, vulcanizing agents using 7 parts by weight of sulfur and 7 parts by weight of zinc oxide, and normal 1,3 dimethybutyl normal phenyl paraffin phenylene. Antioxidants using 1.5 parts by weight of diamine, 1 part by weight of poly2,2,4 trimethyl 1,2 dihydro quinoline and 1 part by weight of waxy hydro carbon are used.

상기 실리카는 100 내지 360의 BET 표면적 및, 200 내지 400의 DBP 흡수가를 갖는 것이 바람직하고, 또한 상기 언더트래드(8)의 카본블랙은 l2흡착이 80~90㎎/g, DBP 흡착이 95~105cc/100g, 톨루엔 착색투과도는 40% 이상이면서, 벨트에지커버(7)의 카본블랙은 l2흡착이 89~90㎎/g, DBT 흡착이 65~75cc/100g, 톨루엔 착색투과도는 40% 이상인 것이 바람직하다.Preferably, the silica has a BET surface area of 100 to 360 and a DBP absorber of 200 to 400, and the carbon black of the undertrade 8 has l 2 adsorption of 80 to 90 mg / g and DBP adsorption of 95 ~ 105cc / 100g, toluene color permeability is more than 40%, carbon black of belt edge cover (7) l 2 adsorption 89 ~ 90mg / g, DBT adsorption 65 ~ 75cc / 100g, toluene pigmentation transmittance 40% It is preferable that it is above.

이하 본 발명의 실시예를 보다 구체적으로 설명한다.Hereinafter, embodiments of the present invention will be described in more detail.

상기 언더트래드(8)는 고무 100 중량부를 기준으로, 디엔계 천연고무 100중량부와 카본블랙 40중량부(l2흡착 80~90㎎/g, DBP 흡착이 95~105cc/100g 이며 톨루엔 착색투과도는 40% 이상의 카본블랙), 침전 실리카 10중량부, 실리카 커플링제 2중량부, 노말터트부틸 2벤조디아질 설펜아미드 1.2중량부, 황 2.2중량부, 스테아린산 2중량부, 산화아연 3중량부, 노말 1,3 디메티부틸 노말 페닐 파라핀 페닐렌디아민 1.5 중량부, 폴리2,2,4 트리메틸 1,2 디하이드로 퀴놀린 1중량부, 왁시 하이드로 카본 1중량부, 스테아린산 1.5중량부, 산화아연 3중량부를 배합하여 제조한다.The undertrade (8) is based on 100 parts by weight of rubber, 100 parts by weight of diene-based natural rubber and 40 parts by weight of carbon black (l 2 adsorption 80 ~ 90mg / g, DBP adsorption is 95 ~ 105cc / 100g and toluene color permeability Is 40% or more of carbon black), 10 parts by weight of precipitated silica, 2 parts by weight of silica coupling agent, 1.2 parts by weight of normal tertbutyl 2benzodiazyl sulfenamide, 2.2 parts by weight of sulfur, 2 parts by weight of stearic acid, 3 parts by weight of zinc oxide, Normal 1,3 dimethybutyl normal phenyl paraffin phenylenediamine 1.5 parts by weight, poly 2,2,4 trimethyl 1,2 dihydro quinoline 1 part by weight, waxy hydrocarbon 1 part by weight, stearic acid 1.5 parts by weight, zinc oxide 3 parts by weight It is prepared by blending the parts.

상기 벨트에지커버(7)는 고무 100을 기준으로, 시스 1,4-폴리이소프렌 천연고무 100phr, 카본블랙 60phr(l2흡착 80~90㎎/g, DBP 흡착이 65~75cc/100g 이며 톨루엔 착색투과도는 40% 이상의 카본블랙), 코발트 0.12phr을 제공하는 유기한 코발트염, 노말 다이시클로헥실 2 벤조디아질 설펜아마이드 1중량부, 가류제로써 황 7중량부와 산화아연 7중량부, 노화방지제로써 노말 1,3디메티부틸 노말 페닐 파라핀 페닐렌디아민 1.5중량부와 폴리 2,2,4 트리메틸 1,2 디하이드로 퀴놀린 1중량부 및 왁시 하이드로 카본 1중량부를 배합하여 제조한다.The belt edge cover 7 is based on rubber 100, cis 1,4-polyisoprene natural rubber 100phr, carbon black 60phr (l 2 adsorption 80 ~ 90mg / g, DBP adsorption 65 ~ 75cc / 100g and toluene coloring Permeability is 40% or more carbon black), organic cobalt salt providing 0.12 phr of cobalt, 1 part by weight of normal dicyclohexyl 2 benzodiazyl sulfenamide, 7 parts by weight of sulfur as a vulcanizing agent and 7 parts by weight of zinc oxide, antioxidant As an example, 1.5 parts by weight of normal 1,3 dimethybutyl normal phenyl paraffin phenylenediamine, 1 part by weight of poly 2,2,4 trimethyl 1,2 dihydro quinoline and 1 part by weight of waxy hydrocarbon are prepared.

상기와 같은 배합에 의해 완성된 본 발명에 따른 래디알 타이어와 종래의 래디알 타이어를 시험링상에 취부하고, 타이어 측면상에 지정된 최대하중등급에 상응하는 공기압으로 팽창시킨 후, 상온에서 81㎞/hr의 속도로 100% 하중하에서 10시간 동안 주행하였을 때 타이어 숄더부 내부의 온도를 측정한 결과를 이하의 표 1에 기재하였는바, 표 1의 기존제품#1은 벨트에지커버가 구비되지 않고 일반적인 언더트래드만을 갖춘 래디알 타이어이며, 기존제품#2는 일반적인 언더트래드와 벨트에지커버를 갖춘 래디알 타이어이다.The radial tire and the conventional radial tire according to the present invention completed by the above formulation are mounted on the test ring, inflated to the air pressure corresponding to the maximum load rating specified on the tire side, and then 81 km / The result of measuring the temperature inside the tire shoulder part when driving for 10 hours under 100% load at the speed of hr is shown in Table 1 below. The existing product # 1 of Table 1 is not equipped with a belt edge cover and is generally It is a radial tire with only under-trad, and the existing product # 2 is a radial tire with a general under-trad and belt edge cover.

Figure kpo00002
Figure kpo00002

상기 표 1의 실험결과에 의하면, 본 발명에 따른 언더트래드와 벨트에지커버를 갖춘 래디알 타이어는 기존제품#1에 비해서 타이어 숄더부 내부온도가 약 15% 정도, 기존제품#2에 비해서는 약 5% 정도 감소되는 효과가 나타났다.According to the experimental results of Table 1, the radial tire with the under-trad and the belt edge cover according to the present invention is about 15% of the internal temperature of the tire shoulder portion, compared to the conventional product # 2 compared to the existing product # 1 The effect was reduced by about 5%.

이상 설명한 바와 같이 본 발명에 따르면, 언더트래드와 벨트에지커버를 저발열재질로 하여, 주행시 타이어, 특히 숄더부의 온도상승이 억제되므로, 타이어의 내구성이 향상되어 제품수명이 연장되는 효과가 있다.As described above, according to the present invention, since the under-trad and the belt edge cover are made of a low heat generating material, the temperature rise of the tire, especially the shoulder portion, during driving is suppressed, thereby improving the durability of the tire and extending the life of the product.

Claims (3)

723 내지 792 kpa의 팽창압력하에서 1220㎏ 이상의 TRA(Tire Rim Association)평가 제한 하중치를 만족하면서 비드직경이 48㎝ 이상이며, 언더트래드(8) 하부의 벨트(3)층 끝단에 벨트에지커버(7)가 부착되어진 래디알 타이어에 있어서, 상기 언더트래드(8)는 고무 100 중량부를 기준으로, 시스 1,4-폴리이소프렌 천연고무 100중량부와, 카본블랙 30 내지 45중량부, 침전된 실리카 5 내지 15중량부, 실리카 표면과 반응성인 실란잔기 및, 상기 조성성분들과 상호 작용하는 하나 이상의 실리카 커플링제가 함유된 탄성중합체 조성물이고; 상기 벨트에지커버(7)는 고무 100 중량부를 기준으로, 시스 1,4-폴리이소프렌 천연고무 100중량부와, 카본블랙 55 내지 65중량부 및, 코발트 0.05 내지 0.15중량부를 제공하는 유기한 코발트염가 함유된 탄성중합체 조성물인 것을 특징으로 하는 래디알 타이어.Under the expansion pressure of 723 to 792 kpa, the bead diameter is 48 cm or more while satisfying the TRA (Tire Rim Association) evaluation limit load value of 1220 kg or more, and the belt edge cover (7) at the end of the belt (3) layer under the under tread (8) In the radial tire attached thereto, the under-trad (8) is based on 100 parts by weight of rubber, 100 parts by weight of natural cis 1,4-polyisoprene rubber, 30 to 45 parts by weight carbon black, silica 5 precipitated To 15 parts by weight, a silane residue reactive with the silica surface, and an elastomeric composition containing at least one silica coupling agent which interacts with the components; The belt edge cover 7 is based on 100 parts by weight of rubber, based on 100 parts by weight of cis 1,4-polyisoprene natural rubber, carbon black 55 to 65 parts by weight, and cobalt 0.05 to 0.15 parts by weight of organic cobalt cheap Radial tires, characterized in that the contained elastomer composition. 제1항에 있어서, 상기 실리카는 100 내지 360의 BET 표면적 및, 200 내지 400의 DBP 흡수가를 갖는 것을 특징으로 하는 래디알 타이어.The radial tire of claim 1, wherein the silica has a BET surface area of 100 to 360 and a DBP absorber of 200 to 400. 제1항에 있어서, 상기 언더트래드(8)의 카본블랙은 l2흡착이 80~90㎎/g, DBP 흡착이 95~105cc/100g, 톨루엔 착색투과도는 40% 이상이고, 벨트에지커버(7)의 카본블랙은 l2흡착이 80~90㎎/g, DBP 흡착이 65~75cc/100g, 톨루엔 착색투과도는 40% 이상인 것을 특징으로 하는 래디알 타이어.The carbon black of the under tread (8) has l 2 adsorption of 80 to 90 mg / g, DBP adsorption of 95 to 105 cc / 100 g, toluene pigmentation permeability of 40% or more, belt edge cover (7) ) of carbon black is the absorption l 2 80 ~ 90㎎ / g, DBP absorption is 65 ~ 75cc / 100g, toluene coloring transmittance radial tire characterized in that less than 40%.
KR1019970045909A 1997-09-05 1997-09-05 A radial tire KR100241627B1 (en)

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KR100445833B1 (en) * 2001-11-26 2004-08-30 한국타이어 주식회사 Radial Tire tread

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KR100782983B1 (en) * 2006-10-27 2007-12-07 한국타이어 주식회사 Undertread rubber composition for bus/truck tire

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* Cited by examiner, † Cited by third party
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